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Jan 20, 2026 · Backend Development

9 Hidden PHP Pitfalls Even Senior Developers Overlook

This article compiles the most common yet subtle PHP mistakes—from type‑comparison quirks and null‑coalescing traps to reference side‑effects, timezone mishandling, JSON encoding issues, and floating‑point precision—offering concrete code examples, safe‑guarding techniques, and a practical checklist to help seasoned developers avoid costly bugs.